mirror of
https://github.com/php/php-src.git
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357 lines
11 KiB
C
357 lines
11 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2016 Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Wez Furlong <wez@thebrainroom.com> |
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| Scott MacVicar <scottmac@php.net> |
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| Nuno Lopes <nlopess@php.net> |
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| Marcus Boerger <helly@php.net> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "zend.h"
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#include "zend_compile.h"
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#include "zend_stream.h"
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#if HAVE_MMAP
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# if HAVE_UNISTD_H
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# include <unistd.h>
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# if defined(_SC_PAGESIZE)
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# define REAL_PAGE_SIZE sysconf(_SC_PAGESIZE);
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# elif defined(_SC_PAGE_SIZE)
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# define REAL_PAGE_SIZE sysconf(_SC_PAGE_SIZE);
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# endif
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# endif
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# if HAVE_SYS_MMAN_H
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# include <sys/mman.h>
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# endif
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# ifndef REAL_PAGE_SIZE
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# ifdef PAGE_SIZE
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# define REAL_PAGE_SIZE PAGE_SIZE
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# else
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# define REAL_PAGE_SIZE 4096
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# endif
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# endif
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#endif
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ZEND_DLIMPORT int isatty(int fd);
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static size_t zend_stream_stdio_reader(void *handle, char *buf, size_t len) /* {{{ */
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{
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return fread(buf, 1, len, (FILE*)handle);
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} /* }}} */
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static void zend_stream_stdio_closer(void *handle) /* {{{ */
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{
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if (handle && (FILE*)handle != stdin) {
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fclose((FILE*)handle);
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}
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} /* }}} */
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static size_t zend_stream_stdio_fsizer(void *handle) /* {{{ */
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{
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zend_stat_t buf;
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if (handle && zend_fstat(fileno((FILE*)handle), &buf) == 0) {
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#ifdef S_ISREG
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if (!S_ISREG(buf.st_mode)) {
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return 0;
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}
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#endif
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return buf.st_size;
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}
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return 0;
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} /* }}} */
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static void zend_stream_unmap(zend_stream *stream) { /* {{{ */
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#if HAVE_MMAP
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if (stream->mmap.map) {
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munmap(stream->mmap.map, stream->mmap.len + ZEND_MMAP_AHEAD);
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} else
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#endif
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if (stream->mmap.buf) {
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efree(stream->mmap.buf);
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}
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stream->mmap.len = 0;
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stream->mmap.pos = 0;
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stream->mmap.map = 0;
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stream->mmap.buf = 0;
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stream->handle = stream->mmap.old_handle;
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} /* }}} */
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static void zend_stream_mmap_closer(zend_stream *stream) /* {{{ */
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{
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zend_stream_unmap(stream);
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if (stream->mmap.old_closer && stream->handle) {
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stream->mmap.old_closer(stream->handle);
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}
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} /* }}} */
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static inline int zend_stream_is_mmap(zend_file_handle *file_handle) { /* {{{ */
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return file_handle->type == ZEND_HANDLE_MAPPED;
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} /* }}} */
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static size_t zend_stream_fsize(zend_file_handle *file_handle) /* {{{ */
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{
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zend_stat_t buf;
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if (zend_stream_is_mmap(file_handle)) {
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return file_handle->handle.stream.mmap.len;
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}
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if (file_handle->type == ZEND_HANDLE_STREAM || file_handle->type == ZEND_HANDLE_MAPPED) {
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return file_handle->handle.stream.fsizer(file_handle->handle.stream.handle);
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}
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if (file_handle->handle.fp && zend_fstat(fileno(file_handle->handle.fp), &buf) == 0) {
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#ifdef S_ISREG
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if (!S_ISREG(buf.st_mode)) {
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return 0;
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}
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#endif
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return buf.st_size;
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}
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return -1;
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} /* }}} */
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ZEND_API int zend_stream_open(const char *filename, zend_file_handle *handle) /* {{{ */
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{
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if (zend_stream_open_function) {
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return zend_stream_open_function(filename, handle);
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}
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handle->type = ZEND_HANDLE_FP;
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handle->opened_path = NULL;
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handle->handle.fp = zend_fopen(filename, &handle->opened_path);
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handle->filename = filename;
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handle->free_filename = 0;
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memset(&handle->handle.stream.mmap, 0, sizeof(zend_mmap));
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return (handle->handle.fp) ? SUCCESS : FAILURE;
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} /* }}} */
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static int zend_stream_getc(zend_file_handle *file_handle) /* {{{ */
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{
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char buf;
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if (file_handle->handle.stream.reader(file_handle->handle.stream.handle, &buf, sizeof(buf))) {
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return (int)buf;
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}
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return EOF;
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} /* }}} */
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static size_t zend_stream_read(zend_file_handle *file_handle, char *buf, size_t len) /* {{{ */
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{
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if (!zend_stream_is_mmap(file_handle) && file_handle->handle.stream.isatty) {
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int c = '*';
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size_t n;
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#ifdef NETWARE
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/*
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c != 4 check is there as fread of a character in NetWare LibC gives 4 upon ^D character.
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Ascii value 4 is actually EOT character which is not defined anywhere in the LibC
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or else we can use instead of hardcoded 4.
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*/
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for (n = 0; n < len && (c = zend_stream_getc(file_handle)) != EOF && c != 4 && c != '\n'; ++n) {
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#else
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for (n = 0; n < len && (c = zend_stream_getc(file_handle)) != EOF && c != '\n'; ++n) {
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#endif
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buf[n] = (char)c;
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}
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if (c == '\n') {
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buf[n++] = (char)c;
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}
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return n;
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}
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return file_handle->handle.stream.reader(file_handle->handle.stream.handle, buf, len);
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} /* }}} */
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ZEND_API int zend_stream_fixup(zend_file_handle *file_handle, char **buf, size_t *len) /* {{{ */
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{
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size_t size;
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zend_stream_type old_type;
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if (file_handle->type == ZEND_HANDLE_FILENAME) {
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if (zend_stream_open(file_handle->filename, file_handle) == FAILURE) {
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return FAILURE;
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}
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}
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switch (file_handle->type) {
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case ZEND_HANDLE_FD:
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file_handle->type = ZEND_HANDLE_FP;
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file_handle->handle.fp = fdopen(file_handle->handle.fd, "rb");
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/* no break; */
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case ZEND_HANDLE_FP:
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if (!file_handle->handle.fp) {
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return FAILURE;
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}
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memset(&file_handle->handle.stream.mmap, 0, sizeof(zend_mmap));
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file_handle->handle.stream.isatty = isatty(fileno((FILE *)file_handle->handle.stream.handle)) ? 1 : 0;
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file_handle->handle.stream.reader = (zend_stream_reader_t)zend_stream_stdio_reader;
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file_handle->handle.stream.closer = (zend_stream_closer_t)zend_stream_stdio_closer;
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file_handle->handle.stream.fsizer = (zend_stream_fsizer_t)zend_stream_stdio_fsizer;
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memset(&file_handle->handle.stream.mmap, 0, sizeof(file_handle->handle.stream.mmap));
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/* no break; */
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case ZEND_HANDLE_STREAM:
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/* nothing to do */
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break;
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case ZEND_HANDLE_MAPPED:
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file_handle->handle.stream.mmap.pos = 0;
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*buf = file_handle->handle.stream.mmap.buf;
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*len = file_handle->handle.stream.mmap.len;
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return SUCCESS;
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default:
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return FAILURE;
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}
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size = zend_stream_fsize(file_handle);
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if (size == (size_t)-1) {
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return FAILURE;
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}
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old_type = file_handle->type;
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file_handle->type = ZEND_HANDLE_STREAM; /* we might still be _FP but we need fsize() work */
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if (old_type == ZEND_HANDLE_FP && !file_handle->handle.stream.isatty && size) {
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#if HAVE_MMAP
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size_t page_size = REAL_PAGE_SIZE;
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if (file_handle->handle.fp &&
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size != 0 &&
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((size - 1) % page_size) <= page_size - ZEND_MMAP_AHEAD) {
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/* *buf[size] is zeroed automatically by the kernel */
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*buf = mmap(0, size + ZEND_MMAP_AHEAD, PROT_READ, MAP_PRIVATE, fileno(file_handle->handle.fp), 0);
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if (*buf != MAP_FAILED) {
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zend_long offset = ftell(file_handle->handle.fp);
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file_handle->handle.stream.mmap.map = *buf;
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if (offset != -1) {
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*buf += offset;
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size -= offset;
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}
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file_handle->handle.stream.mmap.buf = *buf;
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file_handle->handle.stream.mmap.len = size;
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goto return_mapped;
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}
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}
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#endif
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file_handle->handle.stream.mmap.map = 0;
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file_handle->handle.stream.mmap.buf = *buf = safe_emalloc(1, size, ZEND_MMAP_AHEAD);
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file_handle->handle.stream.mmap.len = zend_stream_read(file_handle, *buf, size);
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} else {
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size_t read, remain = 4*1024;
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*buf = emalloc(remain);
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size = 0;
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while ((read = zend_stream_read(file_handle, *buf + size, remain)) > 0) {
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size += read;
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remain -= read;
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if (remain == 0) {
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*buf = safe_erealloc(*buf, size, 2, 0);
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remain = size;
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}
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}
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file_handle->handle.stream.mmap.map = 0;
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file_handle->handle.stream.mmap.len = size;
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if (size && remain < ZEND_MMAP_AHEAD) {
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*buf = safe_erealloc(*buf, size, 1, ZEND_MMAP_AHEAD);
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}
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file_handle->handle.stream.mmap.buf = *buf;
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}
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if (file_handle->handle.stream.mmap.len == 0) {
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*buf = erealloc(*buf, ZEND_MMAP_AHEAD);
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file_handle->handle.stream.mmap.buf = *buf;
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}
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if (ZEND_MMAP_AHEAD) {
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memset(file_handle->handle.stream.mmap.buf + file_handle->handle.stream.mmap.len, 0, ZEND_MMAP_AHEAD);
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}
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#if HAVE_MMAP
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return_mapped:
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#endif
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file_handle->type = ZEND_HANDLE_MAPPED;
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file_handle->handle.stream.mmap.pos = 0;
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file_handle->handle.stream.mmap.old_handle = file_handle->handle.stream.handle;
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file_handle->handle.stream.mmap.old_closer = file_handle->handle.stream.closer;
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file_handle->handle.stream.handle = &file_handle->handle.stream;
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file_handle->handle.stream.closer = (zend_stream_closer_t)zend_stream_mmap_closer;
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*buf = file_handle->handle.stream.mmap.buf;
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*len = file_handle->handle.stream.mmap.len;
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return SUCCESS;
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} /* }}} */
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ZEND_API void zend_file_handle_dtor(zend_file_handle *fh) /* {{{ */
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{
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switch (fh->type) {
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case ZEND_HANDLE_FD:
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/* nothing to do */
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break;
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case ZEND_HANDLE_FP:
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fclose(fh->handle.fp);
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break;
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case ZEND_HANDLE_STREAM:
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case ZEND_HANDLE_MAPPED:
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if (fh->handle.stream.closer && fh->handle.stream.handle) {
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fh->handle.stream.closer(fh->handle.stream.handle);
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}
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fh->handle.stream.handle = NULL;
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break;
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case ZEND_HANDLE_FILENAME:
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/* We're only supposed to get here when destructing the used_files hash,
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* which doesn't really contain open files, but references to their names/paths
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*/
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break;
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}
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if (fh->opened_path) {
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zend_string_release(fh->opened_path);
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fh->opened_path = NULL;
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}
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if (fh->free_filename && fh->filename) {
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efree((char*)fh->filename);
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fh->filename = NULL;
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}
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}
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/* }}} */
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ZEND_API int zend_compare_file_handles(zend_file_handle *fh1, zend_file_handle *fh2) /* {{{ */
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{
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if (fh1->type != fh2->type) {
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return 0;
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}
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switch (fh1->type) {
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case ZEND_HANDLE_FD:
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return fh1->handle.fd == fh2->handle.fd;
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case ZEND_HANDLE_FP:
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return fh1->handle.fp == fh2->handle.fp;
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case ZEND_HANDLE_STREAM:
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return fh1->handle.stream.handle == fh2->handle.stream.handle;
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case ZEND_HANDLE_MAPPED:
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return (fh1->handle.stream.handle == &fh1->handle.stream &&
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fh2->handle.stream.handle == &fh2->handle.stream &&
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fh1->handle.stream.mmap.old_handle == fh2->handle.stream.mmap.old_handle)
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|| fh1->handle.stream.handle == fh2->handle.stream.handle;
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default:
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return 0;
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}
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return 0;
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} /* }}} */
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